Sorry, I was confused by the part numbers. I was thinking of the 6028u based system that have 12x3.5" drives. These are what I used for my OSD nodes in my Ceph deployment.
As for CPU density, I still feel like you're going to need more spindles to get the IO you're looking for.
As for CPU density, I still feel like you're going to need more spindles to get the IO you're looking for.